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ALUMINUM
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DERATING VALUES

Derating of MCBs according to Ambient Temperature
               
In (A) 0 C 10 C 20 C 30 C 40 C 50 C 60 C
               
0.5 0.55 0.53 0.51 0.5 0.48 0.46 0.45
1 1.1 1.07 1.03 1 0.97 0.933 0.90
1.6 1.8 1.7 1.65 1.6 1.55 1.49 1.44
2 2.2 2.1 2.06 2 1.94 1.86 1.80
3 3.3 3.2 3.1 3 2.9 2.8 2.6
4 4.4 4.28 4.12 4 3.88 3.72 3.6
6 6.6 6.4 6.2 6 5.8 5.5 5.6
10 11 10.7 10.3 10 9.7 9.3 9
16 18 17.3 16.6 16 15.4 14.7 14.1
20 22.4 21.6 20.8 20 19.2 18.4 17.6
25 28.3 27.2 26 25 24 22.7 21.7
32 36.2 34.9 33.3 32 30.7 29.1 27.8
40 46 44 42.0 40 38 36 34
50 57.5 55 52.5 50 47.7 45 42.5
63 73.1 69.9 66.1 63 59.8 56.1 52.9
               

 

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